/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)

This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
more details.

You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
**********/
// "liveMedia"
// Copyright (c) 1996-2018 Live Networks, Inc.  All rights reserved.
// H.261 Video RTP Sources
// Implementation

#include "include/H261VideoRTPSource.hh"

H261VideoRTPSource *
H261VideoRTPSource::createNew(UsageEnvironment &env, Groupsock *RTPgs,
                              unsigned char rtpPayloadFormat,
                              unsigned rtpTimestampFrequency) {
    return new H261VideoRTPSource(env, RTPgs, rtpPayloadFormat,
                                  rtpTimestampFrequency);
}

H261VideoRTPSource
::H261VideoRTPSource(UsageEnvironment &env, Groupsock *RTPgs,
                     unsigned char rtpPayloadFormat,
                     unsigned rtpTimestampFrequency)
        : MultiFramedRTPSource(env, RTPgs,
                               rtpPayloadFormat, rtpTimestampFrequency),
          fLastSpecialHeader(0) {
}

H261VideoRTPSource::~H261VideoRTPSource() {
}

Boolean H261VideoRTPSource
::processSpecialHeader(BufferedPacket *packet,
                       unsigned &resultSpecialHeaderSize) {
    // There's a 4-byte video-specific header
    if (packet->dataSize() < 4) return False;

    unsigned char *headerStart = packet->data();
    fLastSpecialHeader
            = (headerStart[0] << 24) | (headerStart[1] << 16) | (headerStart[2] << 8) |
              headerStart[3];

#ifdef DELIVER_COMPLETE_FRAMES
    fCurrentPacketBeginsFrame = fCurrentPacketCompletesFrame;
    // whether the *previous* packet ended a frame

    // The RTP "M" (marker) bit indicates the last fragment of a frame:
    fCurrentPacketCompletesFrame = packet->rtpMarkerBit();
#endif

    resultSpecialHeaderSize = 4;
    return True;
}

char const *H261VideoRTPSource::MIMEtype() const {
    return "video/H261";
}
